GLP-1 Medications: What They Are and How to Track Your Journey

GLP-1 stands for glucagon-like peptide-1, a hormone naturally produced in the gut that plays a role in regulating appetite and blood sugar. Medicines in this class mimic or amplify that hormone's effects, which commonly leads to a reduced sense of hunger and an increased feeling of fullness after eating. Slower stomach emptying is also frequently reported, though this effect often settles over time.

The two medicines most commonly prescribed for weight management in this class are:

• Semaglutide (Wegovy) — a GLP-1 receptor agonist, given as a once-weekly injection
• Tirzepatide (Mounjaro) — a dual GIP and GLP-1 receptor agonist, also given once weekly

Both are prescription-only medicines. Suitability, dosing, and how long treatment continues are decisions made by a prescriber based on an individual's circumstances — not something to determine independently. For a deeper look at how this hormone class works, see our overview of what GLP-1 is and why it matters, or read more about the GLP-1 receptor agonist mechanism.

Side effects are commonly reported, particularly in the early weeks. Gastrointestinal symptoms such as nausea, constipation, and indigestion are among the most frequently noted. These are worth logging carefully — both so you can spot patterns and so you can discuss them clearly with your prescriber or doctor.

Both medicines carry additional monitoring status in the UK (indicated by a black triangle ▼ on their packaging). If you experience side effects, you are encouraged to report them to your healthcare professional and, where applicable, to your national reporting scheme — such as the UK's Yellow Card scheme or the equivalent programme in your country.

Staying consistent week after week is one of the biggest practical challenges on a GLP-1 treatment plan. GLP Trackr is built specifically for people already prescribed Mounjaro or Wegovy, bringing dose logging, side-effect tracking, and progress monitoring into one place.

Log every dose and never lose track

The dose logging feature lets you record each injection — the date, time, and dose strength — so your full treatment history is always to hand. Paired with gentle weekly reminders, it helps ensure a dose is never quietly forgotten. You can also explore how GLP-1 medicines are typically used and what to expect across a treatment course.

Track side effects to share with your prescriber

GLP Trackr's side-effect tracker lets you log symptoms as they happen and view them as a timeline. Rather than trying to recall how you felt three weeks ago at an appointment, you can bring a clear record to your prescriber or doctor — making those conversations more productive. Any decision about managing symptoms should always be guided by your healthcare professional, not made independently.

Watch your progress beyond the scales

Weight, measurements, mood, energy, sleep, and food noise can all be logged through the daily check-in. The insights features surface patterns across your own data over time, so you can see what is actually shifting — not just what the scales say on a given morning.

For a full guide to managing your Mounjaro journey, visit our Mounjaro hub.

GLP Trackr is available free on the App Store and Google Play, with a 7-day trial so you can explore every feature before committing. If you are already on a GLP-1 medicine, your journey is worth tracking properly — start your free trial today on iOS or Android.